UV absorber becomes significant

Customer sometimes does not request weathering test at all because of acrylic’s photo-resistance has been best known as very stable material. Despites of that, weathering test can still be required upon request when the restricted requirements are applied and the choice of UV Absorber becomes significant to the results. Currently, the industry is following ASTM G154-1 & G154-2 and the length of exposure time is varying from a hundred hours to couple hundred hours. In general speaking, a hundred hours is equivalent to 2-4 months outdoor sun exposures depend on the locations. Although these optical films are not directly exposing to the sunlight in the application, but with the respect to a hundred hours weathering test data, it should provide enough information to interpret the changes as after a number of years in the reality. UV absorber becomes a crucial element as the key to achieve and enhance the performance in the weathering test.

As an engineer, questions of how to define the balance in these two systems are always difficult, as these systems are theoretically in a total conflict. In the theory, UV absorber absorbs and cuts the UV light to prevent material degression while UV lights also plays a major role in curing process to solidify and dry up the material. In another words, adding too much UV absorber will extend the UV curing process therefore sacrificing the production time, and if is too less, the performance in weathering test will not be as expected or peak performance. The technology and Know-How background in this area is a “Must”

In Everlight Chemical, we realized this industrial needs; therefore, we present our latest technology to the industry - EVERSORB UR210, a revolutionary UV absorber that specifically design for UV curing application, which allows UV curing process carrying on its normal speed while the total film thickness is under 40μ. With this latest technology, Everlight Chemical provides UV curing industry another option and flexibility for their product developments. Now, “Use It As Needed” means EVERSORB UR210 gives you the capability to upgrade your product performance in weathering test without any hassle. With only 1~3% of EVERSORB UR210 to your original formulation, you can sit back relax and enjoy the benefit.